公开(公告)号：US11437616B2

公开(公告)日：2022-09-06

申请号：US16352334

申请日：2019-03-13

Applicant: INSTITUTE FOR BASIC SCIENCE ,  POSTECH ACADEMY-INDUSTRY FOUNDATION

Inventor： Hee Cheul Choi ,  Hyungki Kim

IPC: H01M4/38 ,  C22C28/00 ,  C22F1/16 ,  H01M10/0525 ,  H01M4/134

Abstract: The disclosure describes a nanowire for an anode material of a lithium ion cell and a method of preparing the same. The nanowire includes silicon (Si) and germanium (Ge). The nanowire has a content of the silicon (Si) higher than a content of the germanium (Ge) at a surface thereof, and has the content of germanium (Ge) higher than the content of the silicon (Si) at an inner part thereof.

公开(公告)号：US20140302385A1

公开(公告)日：2014-10-09

申请号：US13919786

申请日：2013-06-17

Applicant: POSTECH ACADEMY-INDUSTRY FOUNDATION

Inventor： Hee Cheul Choi ,  Hyungki Kim

IPC: H01M4/36 ,  H01M4/04

CPC classification number: H01M4/366 ,  H01M4/0428 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/625

Abstract: A negative electrode for a lithium (Li) secondary battery, a lithium secondary battery using the same, and a method of fabricating the same are provided. The negative electrode for the lithium secondary battery includes a germanium (Ge) structure and a graphene layer directly disposed on a surface of the germanium structure, and the graphene layer is grown on the surface of the germanium structure using a catalyst-free growth process. Accordingly, by directly disposing the graphene layer on the surface of the germanium structure, volume expansion of the germanium structure may be minimized during cycles of an alloying/dealloying reaction with lithium and high electronic conductivity can maintained during long cycles.

Abstract translation: 提供锂（Li）二次电池用负极，使用其的锂二次电池及其制造方法。 用于锂二次电池的负极包括锗（Ge）结构和直接设置在锗结构的表面上的石墨烯层，并且使用无催化剂生长工艺在石墨烯结构的表面上生长石墨烯层。 因此，通过在锗结构的表面上直接设置石墨烯层，可以在与锂的合金/脱离合成反应的循环期间使锗结构的体积膨胀最小化，并且在长时间循环期间可以保持高电子导电性。